# fr = open("3.txt","r")
fr = open("3.txt","rb")
print(fr.read())
# while True:
#     r=fr.read(5)   逐个读取
#     if r =="":
#         break
#     print(r,end="")

# while True:
#     r=fr.readline(10) # 逐行读取 参数为读取个数
#     if r =="":
#         break
#     print(r,end="")
# fr.close()
#
# print(fr.readlines(15))
#
# for line in fr:
#     print(line)